Improvement in mitre-bos



@uiten 'gisten Battiti @ffice- JOH'N' w'. RICHARDSON, OF BOSTON, MASSACHUSETTS;

etters .Patentll 72,906,0Zated December 31,1867: i

IMPROVEMENT IN MITRlE-BOX'.

To ALL -WHOM IT MAY CONOERN;

Be it known that I, JOHN W. RICHARDSON, of Boston, in the county' oi Sputolk, and State of Massachusetts,

have invented a new and improved Mitre-BOX; and I do hereby declare that the following, taken in connection with the drawings which accompany and form part of this specilcation, is a -description of my invention sufficient to'enable those skilled in the art to practise'it.

This mitre-box is sofconstructed as to he applicable to the sawing of angles generally, as well as to the sawing offmitres or' angles of-fort-y-vedegrees, and is designed for use'by all wood-workers, and by shipcarpenters and joiners especially, the work by the last-named artizans being rarely square, and nearly always angular or bevelling. Y. I

My invention -consists in combining with the base, in which the saw kerf-posts are set, opposite movable wings for stock-guides and supports, so connected with each other that movement of one guide shalleause corresponding movement of the opposite guide, and so connected with the piece in which'tlie saw guide-posts are set, or a continuation thereof, as that the stock-guides maybe fastened immovably with respect to said piece, and with respect tol each other, and at any desired anglewith the plane of the movement of the saw.

The drawing illustrates,vin plan, an embodiment of my invention, exhibiting the parts in two different posi tions, the lines in red showing the stock-guides in that position in which the saw willcut square onat an angle of ninety degrees, with reference to them, while the other position shownvis that in which the saw will cut the stock on a. mitre or angle of forty-tive degrees. v I

a isV the base or vmain centre-piece of the apparatus, in which are fixed the saivguide-posts b, the centre piece a being an extension to the rear, which is centrally and longitudinally slotted to receive the screw clamppin c, which operates to bind anyvvherein the slot one end of each of the links d. The stock-guides are cach made up of two pieces, one of which has its upper surface in the same plane with the upper surface of a, between' the saw guide-posts, while the other piece, j', forms a right angle with the surface of e, and is arranged to slide thereon, when needed, "toward and from the plane in which the saw moves, the pices f and'e being' confined together by screws and nuts at g. 'The stock-guides may beA pivoted to the piecepa in any suitable way, for example, as shown in the drawings, or' the pivotal point may be common to both stock-guides, and located in the piece a, with its axis in the plane, Apassing-through the saw-kerfin both posts b. The links areof equal length, and are each pivo'ted to onerot` the'stoclFguides, .at the same distance from the'p-vot or pivots onwhich the stock-guides swing. Consequently, the movement of the guides, and the ,angles which they vform with respect to the line of the saw, must be similar each to the other. v 'Y I The object of the provision for moving the pieces f on the pieces c is to support the stock under the action of the saw, at greater or less distances from the plane of the saws movement, as may be desired. When desired, the saw guide-posts maybe shifted towards or from eachother, suitable holes or mortises being made in a for thatpurpose, or may be changed for other posts having therein iner or coarser saw-kerfs.

I claim a mitre-box, constructed by combining with the piece sustaining the saw guide-posts, stoclGguides separately pivoted, so as to be turned each on its own centre with respect to said piece, and arranged to beheld thereto, and adjusted by means of pivoted links, all substantially as setforth.

' JOHN W'. RICHARDSON. i

Witnesses:

J. B. CROSBY, FnANcIs GOULD. 

